Peter W Ostman wrote:Okay. I talked to an expert. The measurement I'm talking about is called "free bore". In .223/5.56, 1/4in. in a semi-auto is not considered excessive freebore and not likely affecting accuracy when compared to other semi-autos of the same caliber. In a bolt action or single shot rifle where the OAL could be customized >2.260, thereby reducing the 1/4in. free bore, then accuracy could be improved.
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